重複的值Scrolldown已當

-2

我在列表視圖增加按鈕OnClickListener（）該按鈕項增加數在顯示它在testview的問題是當我在列表視圖改變爲相同數量Scrolldown已花葯物品，其增加。重複的值Scrolldown已當

這是我的Adpater

public class ProductsAdapter extends BaseAdapter { 

List<ProductSubModel> myList; 
LayoutInflater inflater; 
Context context; 
int i; 

public ProductsAdapter(Context context, List<ProductSubModel> myList) { 
    this.myList = myList; 
    this.context = context; 
    inflater = LayoutInflater.from(this.context); 
} 

@Override 
public int getCount() { 
    return myList.size(); 
} 

@Override 
public Object getItem(int position) { 
    return myList.get(position); 
} 

@Override 
public long getItemId(int position) { 
    return 0; 
} 

@Override 
public View getView(final int position, View convertView, ViewGroup viewGroup) { 

    final MyViewHolder mViewHolder; 
    i = 0; 
    if (convertView == null) { 
     convertView = inflater.inflate(R.layout.adapter_product, viewGroup, false); 
     mViewHolder = new MyViewHolder(convertView); 
     convertView.setTag(mViewHolder); 
    } else { 
     mViewHolder = (MyViewHolder) convertView.getTag(); 
    } 

    mViewHolder.productImageView.setScaleType(ImageView.ScaleType.FIT_XY); 
    Glide.with(context) 
      .load(myList.get(position).getImage()) 
      .placeholder(R.drawable.nadarah_icon) 
      .override(250, 250) 
      .into(mViewHolder.productImageView); 

    mViewHolder.productNameTextView.setText(myList.get(position).getProductName()); 
    mViewHolder.productDescribtionTextView.setText("DESC : " + myList.get(position).getShortDescription()); 
    mViewHolder.productPriceTextView.setText("PRISE : " + myList.get(position).getPrice()); 
    mViewHolder.discountPriceTextView.setText("DISCOUNT : " + myList.get(position).getMinimalPrice()); 
    mViewHolder.qtyFromApiTextView.setText("QTY : " + 20); 
    mViewHolder.minusImageView.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      if (i > 0) { 
       i--; 
       mViewHolder.qtyUserBuyTextView.setText("" + i); 
      } else { 
       Utils.msg(context , ""); 
      } 
     } 
    }); 
    mViewHolder.plusImageView.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      if (i < 20) { 
       i++; 
       mViewHolder.qtyUserBuyTextView.setText("" + i); 
      } else { 
       Utils.msg(context , ""); 
      } 
     } 
    }); 
    mViewHolder.addtoCartButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 

     } 
    }); 
    return convertView; 
} 


private class MyViewHolder { 
    ImageView productImageView; 
    TextView productNameTextView; 
    TextView productDescribtionTextView; 
    TextView productPriceTextView; 
    TextView discountPriceTextView; 
    TextView qtyFromApiTextView; 
    ImageView minusImageView; 
    ImageView plusImageView; 
    TextView qtyUserBuyTextView; 
    TextView addtoCartButton; 
    TextView productIdTextView; 


    public MyViewHolder(View item) { 
     productImageView = (ImageView) item.findViewById(R.id.productImageView); 
     productNameTextView = (TextView) item.findViewById(R.id.productNameTextView); 
     productDescribtionTextView = (TextView) item.findViewById(R.id.productDescribtionTextView); 
     productPriceTextView = (TextView) item.findViewById(R.id.productPriceTextView); 
     discountPriceTextView = (TextView) item.findViewById(R.id.discountPriceTextView); 
     qtyFromApiTextView = (TextView) item.findViewById(R.id.qtyFromApiTextView); 
     minusImageView = (ImageView) item.findViewById(R.id.minusImageView); 
     qtyUserBuyTextView = (TextView) item.findViewById(R.id.qtyUserBuyTextView); 
     plusImageView = (ImageView) item.findViewById(R.id.plusImageView); 
     addtoCartButton = (TextView) item.findViewById(R.id.addtoCartButton); 
     productIdTextView = (TextView) item.findViewById(R.id.productIdTextView); 
    } 

} 
}

這是適配器實現

private void implementAdpater(List<ProductSubModel> productSubModels) { 
    this.productSubModels = productSubModels; 
    productsAdapter = new ProductsAdapter(getActivity(), productSubModels); 
    productsInCategoryList.setAdapter(productsAdapter); 
    productsAdapter.notifyDataSetChanged(); 
}

來源

2016-11-22 Malik Abu Qaoud

應該有一個字段數量ProductSubModel（或無論是增加或減少），並在每次遞增也時模型遞增。

i++; 
mViewHolder.qtyUserBuyTextView.setText("" + i); 
myList.get(position).setQunatity(myList.get(position).getQunatity()+1);

從聽者

mViewHolder.qtyUserBuyTextView.setText("" + myList.get(position).getQunatity());

相同爲遞減

外

來源

2016-11-22 11:11:14 Bills

取出productsAdapter.notifyDataSetChanged（）;在setadapter（）之後並檢查一次。

支票本，供大家參考： http://www.journaldev.com/10416/android-listview-with-custom-adapter-example-tutorial

來源

2016-11-22 11:00:44 Varma460

重複的值Scrolldown已當

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